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@RestController
@RequiredArgsConstructor
@RequestParam, @RequestParam
@MatrixVariable
@Target, @Retention
@RequestBody , @ResponseBody
@NoArgsConstructor, @RequiredArgsConstructor, @AllArgsConstructor
@Builder
@Getter, @Setter
@Service
@Transactional
@PersistenceContext
JPQL
TypeQuery, Query
getResultList(), getSingleResult()
@ConfigurationProperties, @EnableConfigurationProperties
createNativeQuery
Map.Entry
Collectors.groupingBy
Collectors.summingLong
Map.Entry.comparingByKey
Collectors.toList
mapToLong
@Document
BeanUtils.copyProperties
Collectors.toSet()
Collectors.toMap, Function.identity
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